A researcher wishes to test the claim that the average cost of tuition and fees at a 4-year college is more than $6000.She selects a random sample of 64 colleges and finds the mean to be $6100.The sample standard deviation is $459.Is there evidence to support the claim at = .01?

Step 1: Hypothesis

Step 2: Critical value and acceptance-range

Step3: Compute test-value(calculated z)

Step 4: Accept or reject (ALWAYS EXPLAIN WHY YOU ACCEPT OR REJECT)

b) Construct a 95% confidence interval.